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Volume 21, Number 8—August 2015

Influenza A Viruses of Human Origin in Swine, Brazil

Martha I. Nelson1Comments to Author , Rejane Schaefer1, Danielle Gava, Maurício Egídio Cantão, and Janice Reis Ciacci-Zanella
Author affiliations: Fogarty International Center of the National Institutes of Health, Bethesda, Maryland, USA (M.I. Nelson); EMBRAPA Swine and Poultry, Concordia, Brazil (R. Schaefer, D. Gava, M.E. Cantão, J.R. Ciacci-Zanella)

Main Article

Table 1

Characteristics and phylogenetic position of 16 influenza A viruses from swine sequenced at EMBRAPA (Brazilian Agricultural Research Corporation)*

Virus State† Date collected Specimen type Isolation
method Segments
HA‡ NA§ Matrix Other internal¶
A/swine/Brazil/185-11-7/2011/H1N2 SC 2011 Jul 6 NS ECE/MDCK H1s N2-a pdm pdm
A/swine/Brazil/232-11-13/2011/H1N2 SC 2011 Aug 17 NS ECE H1s N2-a pdm pdm
A/swine/Brazil/232-11-14/2011/H1N2 SC 2011 Aug 17 NS ECE N2-a pdm
A/swine/Brazil/31-11-1/2011/H1N2 PR 2011 Feb 28 Lung ECE H1s N2-a pdm pdm
A/swine/Brazil/31-11-3/2011/H1N2 PR 2011 Feb 28 Lung ECE H1s N2-b pdm pdm
A/wild boar/Brazil/214-11-13D/2011/H1N2 RS 2011 Jul 25 Lung # H1s N2-b pdm pdm
A/swine/Brazil/231-11-1/2011/H3N2 SC 2011 Aug 17 NS ECE/MDCK H3 pdm
A/swine/Brazil/355-11-6/2011/H3N2 RS 2011 Oct 27 NS ECE H3 N2-a pdm
A/swine/Brazil/365-11-6/2011/H3N2 MS 2011 Nov 10 NS ECE/MDCK H3 pdm
A/swine/Brazil/365-11-7/2011/H3N2 MS 2011 Nov 10 NS MDCK H3 N2-a pdm pdm
A/swine/Brazil/12A/2010/H1N1 SC 2010 Jan 30 Lung ECE H1p N1p pdm
A/swine/Brazil/18/2012/H1N1 RS 2012 Feb 10 Lung ECE H1p N1p pdm pdm
A/swine/Brazil/66/2011/H1N1 SC 2011 Apr 13 Lung ECE H1p N1p pdm pdm
A/swine/Brazil/107/2010/H1N1 SC 2010 Jul 15 NS ECE H1p N1p pdm pdm
A/swine/Brazil/132/2009/H1N1 SC 2009 Sep 9 Lung ECE H1p pdm
A/swine/Brazil/263/2012/H1N1 SC 2012 Nov 27 Lung ECE H1p N1p pdm pdm

*ECE, embryonated chicken egg; HA, hemagglutinin; MS, Mato Grosso do Sul State; NA, neuraminidase; NS, nasal swab; pdm, pandemic; PR, Parana State; RS, Rio Grande do Sul State; SC, Santa Catarina State; –, insufficient sequence data available for analysis.
†Location of virus collection among 4 states in southern and midwestern regions Brazil provided for each sample (Figure 1).
‡Viruses are classified as related to human seasonal H1 (H1s, Figure 3), human seasonal H3 (Figure 2), or pandemic H1 (H1p) (Technical Appendix Figure 4).
§Viruses are classified as pandemic (N1p; Technical Appendix Figure 5) or 1 of the 2 clades of human seasonal N2 (a and b; Figure 4).
¶Polymerase basic 2, polymerase basic 1, polymerase acidic, nucleoprotein, and nonstructural.
#Sequencing was performed directly from the original lung sample for A/wild boar/Brazil/214-11-13D/2011/H1N2.

Main Article

1These authors contributed equally to this article.

Page created: July 14, 2015
Page updated: July 14, 2015
Page reviewed: July 14, 2015
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